it was a lot of fun to assamble the cat. Now I am stuck in the calibration process. The Servo Connected to Port pin 5 is not moving (or in most cases when I press "c"). Sometimes he is but it is not reproducible. I Already attached a new more powerfull battery but it is still the same behaviour. Can you give me any advice how to fix the issue?
Uninstall any limbs attached to the servo. Try to swap a servo that’s working to pwm 5. You can also run the moduleTest.ino to diagnose the servo driver module.
Neither joint index 5 nor PWM 5 (on NyBoard V0_2) is used on Nybble. Check the joint map section in the instruction doc.